You can automatically trigger an action or a sequence of actions without involving your user.
Some actions do not require the user, such as triggering the automatic animation of the home screen. To do this, you have some triggers available: Current Screen Display & Current State Display.
To choose these triggers and set up your action, go to your screen/state and do not select any object. Open the Actions window and click + Add.
Select the Current Screen/State Displ ay trigger and set your action.
All the triggers are detailed here: Triggers